Turbine.



E. 0. HUHN.

TURBINE.

APPLICATION I ILIJD APR. 30, 1914.

1 118A19 Patentd Nov. 24, 1914.

Witnesses; Inventor, ErmstQHfijhn, y a tt'g.

U TE STA'PES' PATENT vorator;

ERNST O.HOHN, O1 CHARLOTTENBURG, GERMANY, ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

TURBINE.

17b all whom. it may concern Be it known that I. Enxsr 0. Hours; a citizen of the Swiss Republic, residing at Charlottenburg Germany, have invented certain new and useful Improvements in flurbines, of which the'following is a specification.

The present invention relates to steam or gas turbines.

The object of the invention is to provide an improved system for operating and con trolling the nozzle valves of turbines wherein the valves are under the control of a single regulator or pilot valve and are caused to sticcessivcly open and close in accordance with the demand.

For a consideratitm of what I believe to be novel and my invention, attention is directed to the accompanying description and claims app'nded thereto.

The drawing is a more or less diagrammatic view with the parts shown in section of an arrangement embodying my invention.

Referring to the drawing, 2 represents diagrannnatically a rotor as a buchet wheel mounted on shaft 8 and receiving motive fluid from the sets of nozzles or other fluid discharging devices i 5, (3, 7, and 8. The first set of nozzles 4 are always in connnunication with the steam chest 9. The others are controlled by the valves 10, ll, 12. and 153. which are operated respectively by motors 14-. 153. 1'6, and 17, each of which coinprises a cylinder in which moves a piston connectct'l to the corres mnding valve stem.

id is an ordinary form of regulator or pilot valvc., the heads it) of which normally cover the openings 20 and 2t. Operating fluid, such as steam. air. oil. or water. is admitted between the heads 19 by wa) of pipe 22. and is discharged through openings 23 and 24- and outlet 25. The size of the openings 23 and may be regulated by the needle valves 26.

7 is a pipe crnnecting the opening 21 to the space beneath the piston of motor 1+.

28 and 29 are a series of pipes connecting the spaces below and above the pistons of the respective motors in series. These connecticns are so spaced that when any valve is seated its piston covers the end of the pipe 28 leading from it to the next cylinder, while when open thepiston covers the inlet end of the pipe 29 leading from the preceding cyl- Speciflcation of Letters Patent.

Application filed April 30,

Patented Nov. 245, 1914.

1914. Serial No. 835,420.

inder. The space above the last piston is connected by pipe 30 to the opening 20 of the pilot valve. The pilot valve is controlled by the movable abutment 31, which is subjected on its upper side to the pressure of the region surrounding the nozzle valves; z. 6., the pressure in steam chest 9, by way of passage 32, and on its lower side to a constant pressure, as that of the motive fluid, by way of passage 33. A proper balance is effected by means of the adjustable spring 34. The supply of motive fluid to the tur bine is controlled by the throttle valve 35 operated by the speed governor 36 through a suitable motor mechanism 37.

The operation is as follows: Assume that the turbine is operating and the valves .10, 11, 12, and 13 are all closed. If now an increase in lcad occurs, the governor will open the valve 35 to admit more steam. If this is in excess of what can be handled by the nozzles 4, the pressure in steam chest 9 will build up, causing piston 31 to lower and heads 19 to uncover openings 20 and 21. The pilot valve will then permit motive fluid to flow through pipe 27 to the space beneath the piston of motor 14. thereby causing, the same to move and open valve 10. as the valve opens steam will be admitted to nozzles the pressure in the region surrounding the valves and the piston 31. will operate to cause the pilot valve heads 1!) to again cover ports 20 and 21. The opening of the valve '10 causes the piston of motor 14 to uncover the end of pipe 2H leading therefrom to the next motor 15. It} due to further load, more steam is admitted than can be taken care of by nozzles and 5, the pressure will agath build up. and piston 31 will be operated to cause the pilot valve to admit motive fluid under the piston of motor 15 by \vay of pipe 2?. cylinder of motor 1-1. and pipe :28. The piston of motor 15 will thtis be operated to open valve 11 and at the same time will uncover the end of pipe leading to motor 16 and cover the end of pipe *2!) leading from mctor 14. This operation can be repeated until all the valves are open. In case of a falling oil of the load the reverse action takes place. as will be apparent, the valves 10 to 13 being closed in reverse order to their opening.

By means of the needle valves 26, the

openings 23 and st-i can be regulated to re- As soon- This will cause a lowering of strict the flow and build up a pressure on one side or the other of heads 19 so as to V and opening 20 Will be retarded by the constricted opening 23, thereby building up a oressure above the upper head 19 tending to l old the piston 31 lowered, and retarding its return to normal position for a sufficient time for the full opening of the nozzle valve.

In accordance with the provisions of the patent statutes, 1 have. described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but ll desire to have it understood'that the appsratus shown. is only illustrative, and that the invention. can be carried out by other means.

What I claim as new and desire. to secure by Letters Patcnt'of the United States,

1. The combination in a turbine, of fluid discharging means, valves controlling the iiow of fluid thereto, a piston for each valve, a cylinder for each piston, a regulator for controlling; the supply of actuating fluid to the cylinders, means connecting the reg-1r lator and cylinders so that said regulator may cause the piston to operate ,to successively open the valves and to close them in the reverse order, a movable abutment for controlling the regulator, said abutment being subjected to the pressure in the region of the controlling valves on one side and to a substantially constant pressure on the other, a main valve mechanism controlling the admission of operating fluid to the discharging means, and a governor for the same.

52. The combination in a turbine, of fluid discharging; means, valves controlling the flow of fluid thereto, piston for each valve, a cylinder for each piston, a regulator for controlling thesupply of actuating fluid to the cylinders, two sets of pipes, one set conmeeting the spaces above and the other the spaces below the pistons in series, pipes connecting the first and last cylinders to the regulator so that the regulator may cause the pistons to operate to successively open the valves and to close them in the reverse order, a movable abutment for controlling the regulator, said abutment being, subjected to the pressure in the region of the controlling valves on one side and to a substantially constant pressure on the other, a main. valve mechanism controlling the ad mission of operating fluid to the discharging; means, and a governor for the same.

'lhe combination in a turbine, of

ply of actuating" fluid to the cylinders, means connecting the regulator and the cylinders so that said regulator may cause the pistons to operateto successively open the valves and close them in the reverse order, a movable abutment for controlling the regulator,

said abutment being subjected to the pressure in the region of the controlling valves on one side and to a substantially, constant pressure on the other, means for restricting the outlet openings of said regulator so as to retard the flow therefrom, a main valve mechanism controlling the admission of operating fluid to the discharging ineans, ,and a governor for the same. i

a. The combination in a turbine, of fluid discharging means, valves controlling the" flow of fluid thereto, a piston for each valve, a cylinder for each piston, a regulatorfor controlling the supply of actuating fiuid to the cylinders, two sets of pipes, one set con necting the spaces above and the other the spaces below the pistons in series, said pipes being so spaced that when any valve is closed its piston covers the end of the pipe leading from the space below to the piston of the next succeeding cylinder, and when any valve is open its piston covers the endof the pipe leading to the space above the piston from the preceding cylinder, pipes connecting the first and last cylinders to the regulator so that the regulator may cause the pistons to operate to successively open the valves and to close them in the re] verse order, a. movable abutment for controlling the regulator, said abutment being subjected to the pressure in the region of the controlling valves on one side and to a substantially 'constant pressure on the other, a main valve mechanism controlling the admission of operating fluid to the discharging means, and a governor for the same.

In witness whereof, I have hereunto set my hand this 4th day of April, 1914.

ERNST o. noun.

Witnesses: I

BRUNO Bonous, KONRAD RUPPRECHT.

It is hereby certified that in Letters Patent No. 1,118,419, granted November 24.,

1914:, upon the application of Ernst O. Hohn, of Chnrlottenbnrg, Germany, for an improvement in fTurbinesfl'nn error appears in the printed speeifiention requiring correction as follows: Page 2, line 67 for the word liquid readfluid; and that the said Letters Patent should be rend with this correction therein that the some may conform to the record of the ease inithe Potent ()tiice.

Signed and sealed this 26th day of Jnnunry, A. D., 1915.

[SEAL] n. F. WHI'lEHEAD,

Acting Commissioner of Patents. 

